fix: correct resource name condition (#71)

The condition for Log Analytics Workspace name is currently incorrect. The correct condition as per Microsoft documentation is: "4-63 chars, Alphanumerics and hyphens. Start and end with alphanumeric."

source: https://learn.microsoft.com/en-us/azure/azure-resource-manager/management/resource-name-rules#microsoftoperationalinsights

variables.tf

@@ -10,7 +10,7 @@ variable "name" {
   nullable    = false
 
   validation {
-    condition     = can(regex("^[a-z0-9-]{4,63}$", var.name))
+    condition     = can(regex("^[A-Za-z0-9-]{4,63}$", var.name))
     error_message = "The name must be a valid Log Analytics Workspace name."
   }
 }